html, body{ margin:0; height:100%; }

/* header 头部导航 */
.header {
  background-color: #606c72;
  overflow: hidden;
}

/*
 * Sidebar 侧边栏
 */
.sidebar {
  background-color: #ffffff;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100; /* Behind the navbar */
  padding: 60px 0 0; /* Height of navbar */
  box-shadow: 1px 0 0 rgba(0, 0, 0, .1);
}

.sidebar-sticky {
  position: relative;
  top: 0;
  height: calc(100vh - 60px);
  padding-top: .5rem;
  overflow-x: hidden;
  overflow-y: auto; /* Scrollable contents if viewport is shorter than content. */
}

@supports ((position: -webkit-sticky) or (position: sticky)) {
  .sidebar-sticky {
    position: -webkit-sticky;
    position: sticky;
  }
}

.sidebar .nav-link {
  display: flex;
  align-items: center;
  font-size: 15px;
  color: #333;
  padding: 15px 0 15px 25px;
}

/* 图标 */
.feather {
  width: 16px;
  height: 16px;
  vertical-align: text-bottom;
}

.sidebar .nav-link .feather {
  margin-right: 10px;
  color: #999;
}

.sidebar .nav-link.active {
  background-color: #f9f9f9;
}

.sidebar .nav-link:hover .feather,
.sidebar .nav-link.active .feather {
  color: inherit;
}

.sidebar-heading {
  font-size: .75rem;
  text-transform: uppercase;
}